【摘要】 对莼菜花器官的结构、开花物候期、开花动态、柱头可授性、花粉活力、花粉/胚珠(P/O)、繁育系统、传粉方式及杂交技术进行初步研究。结果表明:莼菜群体花期为5月初～6月初,30d左右,单朵花期2d,同一朵花内的雌雄蕊在时间和空间上隔离。莼菜不存在无融合生殖现象,柱头可授期主要在开花第1天,人工授粉(第1天开放的花)结实心皮的比例为27.8%,高于自然授粉(20.9%);花粉活力在自然条件下保持4～5d。P/O平均为14947,属专性异交(Obligate xenogamy)型。更多还原

【Abstract】 Structure of flower,flowering phenology,floral dynamic,stigma receptivity,pollen vitality,pollen germination rate,breeding system,pollination and hybridization of Brasenia schreberi were studied.The result showed that the population florescence could last about 30 days,from early May to early June.A single flower could bloom for 2 days with segregation between stamen and pistil both in time and space.There was no apomixes.Stigma receptivity appeared on the first day of blossom.The rate of seed to carpel through artificial pollination was 27.8 % which was higher than through natural pollination (20.9 %).Pollen vitality kept 4-5 days after blossom.The average P/O was 14 947,belonging to obligate xenogamy.更多还原